<p>404 page is </p>
<pre><code><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
<img src="/assets/osm_logo.png" style="float:left; margin:10px">
<div style="float:left;">
<h1>File not found</h1>
<p>Couldn't find a file/directory/API operation by that name on the OpenStreetMap server (HTTP 404)</p>
<p>Feel free to <a href="http://wiki.openstreetmap.org/wiki/Contact" title="Various contact channels explained">contact</a> the OpenStreetMap community if you have found a broken link / bug. Make a note of the exact URL of your request.</p>
</div>
</body>
</html>
</code></pre>
<p>But /assets/osm_logo.png is not available for 404 page, what results in a broken image symbol</p>
<p>See for example <a href="https://www.openstreetmap.org/assets/osm_logo.png">https://www.openstreetmap.org/assets/osm_logo.png</a> </p>
<p>Note that this image exists at <a href="https://github.com/openstreetmap/openstreetmap-website/blob/master/app/assets/images/osm_logo.png">https://github.com/openstreetmap/openstreetmap-website/blob/master/app/assets/images/osm_logo.png</a></p>
<p><a href="https://cloud.githubusercontent.com/assets/899988/16260748/079e9888-3869-11e6-9493-e91226ae275a.png" target="_blank"><img src="https://cloud.githubusercontent.com/assets/899988/16260748/079e9888-3869-11e6-9493-e91226ae275a.png" alt="selection_005" style="max-width:100%;"></a></p>
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